1Excellent AM/FM radio performance and bass enhancement options to enhance the listening experience. 230db noise reduction level and sound activated compression can protect ears from the damage of heavy machine noise. 3Adjustable headband ensures wearing safety, compact design for easy storage. 4Audio input socket for listening to MP3 players or smart phones; builtin volume control knob, convenient to use. 5Audio assist technology can help you program multiple AM/FM radio stations and notify you when the battery is low. 6Soft and thick headband with lowkey appearance, comfortable fit, good toughness, make the earmuffs close to the ear. 7Powered by 3pcs AAA batteries (not included), full body spray rubber oil, brings comfortable and highend touching feel. Conditon: 100% Brand New Item Type: AntiNoise Earmuffs Material: ABS Plastic Color: Black + Yellow Battery: 3Pcs AAA Battery (Not Included) Finish Treatment: Spray Rubber Oil Noise Reduction Level (NRR): 30 dB Usage: Passive Protection Average Battery Life: Approx. 350 Hours } 1 xElectronic Noise Reduction Earmuff 1 xAudio Cable 1 x Manual